河南邙岭塬黄土地层

基金项目:

国家自然科学基金(49972060)

国家重点基础研究专项经费资助项目(G1999043401)

LOESS STRATIGRAPHY OF MANGLING IN HENAN PROVINCE

1. Institute of Geomechanics, CAGS, Beijing 100081, China;
2. Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710054, China;
3. Electric Power Construction Co., Ltd., Zhejiang Hangzhou 310051, China

摘要: 通过河南邙岭塬北缘中部,孟津扣马黄土剖面野外观测及室内磁化率研究,剖面共发育11层(S_1~11)以上黄土-古土壤序列,各层古土壤清晰;但第二层(S₂)的磁化率值相对较低,而且与第三层(S₃)间所夹黄土层非常薄,显示异常特征。古地磁测试结果揭示,B/M界限在深度38.9m处,位于L₈的底部。松山负极性时晚期,记录了两段正极性。
- 黄土 /
- 邙岭塬 /
- 河南
Abstract: In this paper,Kouma profile,located in Mengjin,Henan north of middle Mangling Plateau Form has been studied.This profile contains S₁₁ and upwands loess-paleosol each loess and paleosol are clear.The magnetic susceptibility curve shows that the susceptibility value of S₂ is lower than the others,while the thickness of L₃ is very thin,showing abnovmal character.Palaeomagnetic stratigraphy shows that the depth of the boundary between Brunhes normal polarity chron and Matuyama reversed one is 38.9 meters,which located at the lower part of L₈.Furthermore,two normal polarity intervals are revealed in the late Matuyama reversed polarity chron.
- loess /
- Mangling Plateau Form /
- Henan